docs: def virt_customize(self, options):
          """
          Handler for 'virt-customize'
          note: if 'ssh-inject' option was specified without a path to a key,
          the prefix' key will be copied to the vm.
  
          Args:
              options (lst of str): Options and arguments for 'virt-customize'
  
          Returns:
              callable: which handles cmd
  
          Raises:
              lago.build.BuildException: If an handler for cmd doesn't exist
          """
          cmd = ['virt-customize', '-a', self.disk_path]
          if 'ssh-inject' in options and not options['ssh-inject']:
              options['ssh-inject'] = 'root:file:{}'.format(
                  self.paths.ssh_id_rsa_pub()
              )
  
          options = self.normalize_options(options)
          cmd.extend(options)
          return Command('virt-customize', cmd)